The Raptor warning light is a simple 2-wire, 7 LED indicator, housed in a 1.5 inch aluminum anodized housing. Use it to indicate various engine conditions or replace that bulky shift light on the side of your aftermarket tachometer. It can be used with our RPM activated switch for a remote shift light setup or can be used with existing electronics with a "shift out" output. There is no electronics inside the warning light to read rpm. This is only an indicator. Check out our line of shift lights if you need a stand alone shift light.